JPH0797274B2 - Voice response level adjustment method for voice response device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a voice transmission level adjusting system for a voice response device using a subscriber telephone line.

[Technical background of the invention and its problems]

In a voice response device using a subscriber telephone line, it is necessary to set the voice transmission level (loudness of sound) to a value according to the designation of Nippon Telegraph and Telephone Public Corporation. For this reason, conventionally, a level resistor such as a variable resistor or an attenuator is provided for each subscriber telephone line, and the level adjuster is individually operated to adjust the voice transmission level for each subscriber telephone line.

Therefore, in the past, the number of set points increased as the number of subscriber telephone lines increased, and this type of level adjustment required a great deal of time and labor.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and in a voice response device using a subscriber telephone line, a level adjusting mechanism such as a variable resistor or an attenuator for adjusting a voice output level transmitted through a line is not required, and a hardware is provided. It is an object of the present invention to provide a voice transmission level adjusting system for a voice response device which can simplify the wear and can easily and quickly perform the adjustment work.

[Outline of Invention]

The present invention is an 8-bit reference level (0 dB) according to the μ255 rule.
The voice data has, for example, a table and a processing device that level-converts the voice data to -6 dB, -12 dB, and the like, and a memory that stores the level-converted voice data, and the voice response device stores the voice data stored in the memory. It is configured to selectively take out as needed and send it out on the line.Therefore, it is not necessary to adjust the voice output level for each line by providing a variable resistor, an attenuator, etc. for each subscriber telephone line unit.
The audio output level can be adjusted easily and quickly.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 101 is a μ255 rule 8-bit reference voice level (0d
This is a magnetic disk device (hereinafter referred to as DISK) in which the voice data (voice message data) of B) is stored. Reference numeral 102 denotes an audio processor for audio level conversion (hereinafter referred to as CP, which reads out audio data stored in the DISK 101 and performs level conversion processing according to an externally specified level conversion specification.
U) and 103 is an internal memory (hereinafter referred to as MEM) provided for the processing of the CPU 102. In the MEM 103, two conversion tables TBL _A and TBL _B for converting the audio data into audio levels of −6 dB and −12 dB are prepared.
These conversion tables TBL _A and TBL _B are each composed of 256 bytes, and the μ255 rule 8-bit data is expanded to 12-bit linear data, divided by a constant according to the amount of attenuation, and compressed again to 8-bit data. Created by. 104 is CPU
A voice memory (VOM) for storing the voice data whose level is converted by 102. When sending a voice message, the voice data is read from the voice memory 104 at the time of sending a voice message, the read 8-bit data is expanded into 12-bit linear data, digital-analog converted, and the subscriber telephone line L _i is read.
It is a voice response device to be sent out.

Here, the operation of one embodiment will be described. Audio data is -6dB
When a command to convert to the voice level of is received by CPU102, CPU102 tells DISK101 to use μ255 rule, 8 bits, 0 dB.
Read the voice data of. Then, this data is level-converted to a voice level of -6 dB using the first conversion table TBL _A in the MEM 103, and then written in the voice memory 104. Such level conversion processing is sequentially performed on all the audio data stored in the DISK 101.

As a result, the audio memory 104 stores each audio data stored in the DISK 101 with an audio level of 06 dB.

The voice response device 105 reads voice data from the voice memory 104 at the time of voice transmission, and outputs this 8-bit voice data to
After being converted into bit linear data, it is digital-analog converted and sent out on the line L _i .

If you want to lower the audio output level to -12 dB, use the CPU102
Performs level conversion processing similar to the above using the second conversion table TBL _B in the MEM 103, and the level-converted audio data is stored in the audio memory 104 in the same manner as above.

If it is not necessary to change the audio output level, DISK101
The μ255 rule 8-bit data thus read is written in the voice memory 104 as it is.

In this way, the μ255 rule 8-bit data of the reference voice level (0 dB) is converted into an arbitrary voice level and stored, and then read by the voice response device 105 and subjected to digital-analog conversion to be transmitted on the line L _i . Since the audio signal is transmitted, the audio output level can be adjusted quickly and easily without performing the setting operation of the variable resistor, the attenuator, etc. on a line-by-line basis.

〔The invention's effect〕

As described in detail above, according to the present invention, in a voice response device using a subscriber telephone line, a level adjusting mechanism such as a variable resistor or an attenuator for adjusting the voice transmission level transmitted through the line is unnecessary, and a hardware It is possible to provide a voice transmission level adjusting method for a voice response device which can simplify the wear and facilitate the adjustment work easily and quickly.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 101 ... Magnetic disk unit (DISK), 102 ... Arithmetic processing unit (CPU), 103 ... Internal memory (MEM), 104 ... Voice memory (VOM), 105 ... Voice response unit, TBL _A , TBL _B …… Conversion table, L ₁ , L ₂ ,… L _m …… Subscribed telephone line.

Claims (2)

[Claims] 1. A first storage device for storing audio data of a standardized digital amount of a reference level, and an audio level for selectively converting the audio data stored in the first storage device. A conversion table, a processing device for converting a sound level using this table, and a second storage device for storing the sound data level-converted by the processing device are provided and stored in the second storage device. Voice response device selectively reads the voice data
A voice output level adjustment method for voice response devices, which is characterized by analog conversion and transmission on the line. 2. The audio level conversion table is created by decompressing μ255 rule 8-bit data into 12-bit linear data, dividing by a constant according to the conversion target level, and compressing into 8-bit data. 5. A method of adjusting a voice transmission level of a voice response device according to the first section.